20157367543 has 2 divisors, whose sum is σ = 20157367544. Its totient is φ = 20157367542.

The previous prime is 20157367507. The next prime is 20157367547. The reversal of 20157367543 is 34576375102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20157367543 - 2²⁹ = 19620496631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20157367543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20157367547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10078683771 + 10078683772.

It is an arithmetic number, because the mean of its divisors is an integer number (10078683772).

Almost surely, 2^20157367543 is an apocalyptic number.

20157367543 is a deficient number, since it is larger than the sum of its proper divisors (1).

20157367543 is an equidigital number, since it uses as much as digits as its factorization.

20157367543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 529200, while the sum is 43.

The spelling of 20157367543 in words is "twenty billion, one hundred fifty-seven million, three hundred sixty-seven thousand, five hundred forty-three".